CVE-2026-74480
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
net: bridge: stop fast-leave after deleting a port group
In the Linux kernel, the following vulnerability has been resolved: net: bridge: stop fast-leave after deleting a port group br_multicast_leave_group() iterates mp->ports with pp = &p->next in its fast-leave path. After br_multicast_del_pg() removes p, continuing the loop advances pp through the deleted entry. If multicast-to-unicast was enabled, the bridge can hold multiple port groups for the same port and group with different source MAC addresses. Once multicast-to-unicast is disabled, br_port_group_equal() matches those entries by port only. A fast leave can then delete one entry and continue from its stale next pointer, leaving mp->ports pointing at a deleted port group. Fast leave only needs to remove one matching port group. Break after br_multicast_del_pg() so the loop stops before dereferencing the removed entry.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | d6c32e2e25a9a06ba021030e26b6d602a277eb72 | Unavailable | None listed |
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | 482bcb85139addb4e8ac8ed10baeda3e0aad4031 | Unavailable | None listed |
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | 1a109cc9890d017c41d77e6c82da739579c49f0b | Unavailable | None listed |
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | 159ad90cb929c033308bb39a2c5f8fbf393b77aa | Unavailable | None listed |
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | 4695430e8132420bf8de94da3eb36a6cf35fde6b | Unavailable | None listed |
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | 0309ebbc570000ea0df11c06b69798e5860c5f6f | Unavailable | None listed |
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | 4c57056ca6aace2e9f94ae9298bf49ef6b0c95e4 | Unavailable | None listed |
| 6db6f0eae6052b70885562e1733896647ec1d807 | affected | git | a39789f211b8a4125f0c70e05b30cf715f4f187d | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.11 | Unavailable | None listed |
| 5.10.265 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.216 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.151 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.103 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.44 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.8 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |